A long lost and unreleased version of Indy Heat has been packaged up and released, but only 50 limited edition copies will be available. So if you want to grab a copy, then check out the Atari Age forums for more details.
News source: Retro Fusion (Direct news link)
After doing some research through old emails, i’ve found that a good chunk of the graphical work was done by the late Martin Holland. A shame, as back then (2000/2001) he was asking about if I knew where to get a ROM image from.